A method for obtaining a three-dimensional curved surface compression variable geometry intake port structure

Abstract

The invention relates to a three-dimensional curved surface compressive variable geometry air inlet passage structure obtaining method, which belongs to the technical field of pneumatic design and aims at solving the problem of mechanical structure realization difficulty of the air inlet passage variable geometry regulation by a three-dimensional curved surface compression mode. The basic configuration of an air inlet passage is firstly set; then, the basic geometric profile of a removal tank of a boundary layer and the basic control mode of a peripheral sealing cavity are determined; finally,the rotating shaft position and the required rotating angle range of a primary / secondary variable geometry rotating component are determined; then, the structure of connecting sub components among the rotating component, the fixed wall surface of the air inlet passage, the side wall of the sealing cavity and the rotating component is determined; if the obtained air inlet passage structure does not conform to the design requirements, the structure is returned for performing iteration until the requirements are met. The method is simple, so that the air inlet passage can maintain normal work ina wider Ma range; the mechanical structure problem of the three-dimensional curved surface variable geometry is solved; meanwhile, the flowing control capability such as boundary layer removal is realized.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic design, and in particular relates to a three-dimensional curved surface compression high Mach (Ma) number intake port design method with variable geometry adjustment in a wide speed range. Background technique [0002] Due to its outstanding application value and significance, the near-space air-breathing high-Ma number aircraft has attracted extensive attention from the world's aerospace powers. At this stage, there are many technical problems that need to be solved or broken through. Among them, the air intake is the main component of the air-breathing engine. On the one hand, it compresses the airflow in front of the entire flight envelope and has a certain impact on the aircraft flow field. Normal operation provides the required airflow. Therefore, the quality of its performance directly determines the overall performance of the air-breathing high Ma number aircraft in the adjacent space....

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the difficulty in realizing the mechanical structure of the variable geometry adjustment of the intake port in the form of three-dimensional curved surface compression, and propose a method for obtaining the high Ma number intake port structure of the three-dimensional curved surface compression variable geometry adjustment

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